Rastus... no, other than the JP adjustable.... my primary and backup lowers are pretty old, and were built before the numerous models of triggers were available... I've used the RRA NM triggers on all my rifles, even to the point of replacing the ArmaLite match trigger in my 15T with one... a good friend is the SOCOM technology and weapons guy, and he shoots a Geissele, but I'm not sure which model...